We also offer to do web design for our clients, but we're admittedly not design experts and refer clients looking for serious designs to 99designs. So if we hook up with a good designer there's definitely potential for referrals.

Requirements

Something that walks the line between Professional and Cool. High Quality, but Affordable (not Cheap).

We're not exactly sure what we want it to look like, but we kind of know a little about what we think we don't want in a logo.

We don't think we want a super edgy logo, but a little cool factor is good
We don't think we want a cartoon logo
We don't think we want something overly corporate looking

UPDATE:
One of the things we do is put a high emphasis on helping smaller companies on a budget leverage the many free or cheap services available only and bring them all together to run their business and build their online brand. So logos that reference smaller pieces coming together to form something larger may be interesting, not a requirement, just a thought.